Key action for typewriting and other key-operating machines



July 30, 1929; u, DESHA 1,722,954

KEY ACTION Pow TYPEWRITING AND OTHER KEY OPERATING MACHINES Filed March24, 192.7 4 Sheets-Sheet 1" i '2; Fi i:

July 30, 1929. o. u. DESHA KEY ACTION FOR TYPEWRITING AND OTHER KEYOPERATING MACHINES Filed March 24, 1927 4 Sheets-Sheet 2 V W M 1 July30, 1929. O DESI-{A 1,722,954

KEY ACTION FOR TYPEWRITING AND OTHER K EY- OFEATING MACHINES.

Filed March 24, 1-927 4 Sheets-Sheet 3 July 30, 1929. u, -1 1,722,954

KEY ACTION FOR TYPEWRITING AND OTHER KEY OPERATING MACHINES Filed March24, 1927 4 Sheets-Sheet 4 Patented .luly 30, 1929.

tlhll'l'ED STATES ORVILLE TI. DES'EA, (3F FORT CQZZLINS, COLORADO,ASSZGIIOR BESHA TYFELEXVTRUST ESTATE, OF. FORT CGZLINS, COLOR-ADO.

ACTION FOR TYPEWRITIHG 'AND OTHER.KEYOIPERATING MACHINES.

Application filed. March 24, 192?.

My invention relates to hey-action for typewriters and other type andhey operating es, actuating means at all times operaconnecting the typebar and key lever,

tively r moving the type bar to printing point upon the, depression 01'a key lever and meansreversely breaking the said connection after theprinting impact of the type bar for the return g the movement necessaryto effect the 1 in. If and before the key lever has com- .)leted itsmovement; and the present application providing means of the characterspecihed above which in the main is in the nature of another form ofstructure that may readily be incorporated in certain typewrit ingmachines.

The draw'ngs Fi 's. I, II, III and 1V Sheets one and two show myinvention embodied in a machine similar to the Remington standardtypewriter and in which the invention may be readily incorporated by aslight modification oi structural features of the machine in effectsuchincorporation. Figs. 1, 11, ill and UP sheets three and tour show myinvention emhor icd in a machine similar to the Royal stanna dtypewriter, a slight change in form of any of t he corresponding partssuch is shown by compar ng the two sets of drawings accompanying thisapplication is immaterial and it should be understood also tliiltfihfiinvention is. not restricted to use in machines of the above type,butmay be em ployed wherever found available.

The desired principle of operation, new mechanical functions, operativeexpedients, and other objects and advantages are hereinafter desired andare more particularly pointed out in the appending claims. In theaccompanying drawing, wherein like reference ch'a iClIQl indicatecorresponding parts in the various views.

in the drawings Eignres E and I eac i avertical section of. atypewriting machine, one key-action only being shown in normal position. El g ent views oi'- the lreyunechanism similar to Fig. P thelrcylever being shown in a depressed position and Serial No. 1?8,083.

responding actuating the type bar. ill also key mechani similar 4 thehey lever being shown in a depressed position and the type bar returnedto its initial position. Figs. IVA V is a slrel t 15o the key-mechanismtor il in describing the mode operachine shown. It is understood, ofcotor the sake of clearness and avoid c: plication of drawings theapplicant has or ted to show or describe the iemaii of l; levers andtype bars as well as other devices necessary or advisable in tl ecomplete macame.

in the embodiment in I, and I, 1 indicates the frame of a typewriter-1indicates the front 1 the rear, having a plate i by paper carriage notshown, 6 indione the usual type-bars carryi c as front end, and havingan operative c i1- ncction 8 the rear end, and is arranged to turn onpiv t 9 in the form of a segment deposed v rtici lly belov frame face ofthe plate I hereb providing the type 7 with a compoint A, as thetypo-bar 6 turns om the normal horizontal posithe rest on t the segment11; 12 indicates y ers carrying at the front end 8 he rear end pivotedat 14 to er of the machine, and is kept in its elevated position byreturn k 5 ported by bar 15, at normal rest the hey -lever bearingagainst the under side of stop bar 15" above the front part of thekeylever 12, in the usual manner.

Key-lever 12 is formed with an upward projection 16 and provides arear sddle-backer seat 1'? for the trip-link coupling hereinafter described.

I The hey-lever 12 is described as having two incidents of operation,namely: the inside of depression and incident of release. The incidentof depression is disclosed by the downward movement of hey-lever 12 fromradius to radius C, and the incident of release is disclosed by themovement of l 12 back from radius C to radius B. The t; i bar 6 isdescribed as having two incidents of operation, namely the incident ofresponse and the incident of recoil. The incident of response oftype-bar 6 is disclosed by the movement of the type-bar from its initialrest i E to the printing point A, indicated by tormngarc G from pivot 9.The incident-oirecoil of type-bar 6 is uisclosed by pling to behorizontally its movement from its printing point A back to normal restE. These incidents ofoperation are, of course present in previoustypebar actions in so far as the incident of response E to A of thetype-bar 6 occurs simultaneously with incident of depression B to G, ofkey lever 12, and the incident of recoil, A to E, of the type-bar occurssimultaneously with the incident of release, C to B, 01"" the key-lever,but my invention relates to later correlation of incidents of operationof the key-levers with that of the type-bar, in conforming to theoperative expedient by which both the incident of response, E to A, ofthe type-bar and incident of recoil, A to E, occur during the oneincident of depression, 13 to C, of the key-lever.

in this case, tl e trip-1i nk coupling peculiarly arranged between theke -lever and the type bar accon'iplishes this operative expo client thearrangement of said trip-link coupling being the subject matter 01" thisapplication, hereinafter described.

18 indicates one of a series of vibratory levers, corresponding innumber with type bars 6 and key levers 12. lntermediately their ends thevibratory levers 18 are pivoted at 19 in a bar 20 extending across themachine. Means operatively connecting the type bar 6 and upper end ofvibratory le er 18 may be the usual pin and slot connection 8, 8, Figs.1, H, and ill or it may be the usual forward pull links 21 Figs. 1,112111.

22 is a backward draw link and 23 is a thrust link of what is describedas a trip link coupling. The backward draw link 22 is pivoted at 25interinediately of its ends to the lower end of the vibratory lever 18,and the rear end of the upward curved draw link 22 is pivoted at 24 tothe rear end of the trip link 28, the forward end of the trip link 23being: pivoted at 26 to the upward projection 16 of the key lever 12.

The relative normal positions of pivots 24, 25 and 26 are engaged in aline nearly horizontal with the key lever 12 as shown by J J 1V, LIV,disclosing the trip link coulisposed distinguished from being; en gagedperpendicular to the key lever. It will be observed that the backwarddraw link 22 and the thrust link 23 constituting the trip link couplingoperate in a plane above the key lever, disclosing}; the invention to beoverslung. Also, it will be noted that LllQ backward drew link andthrust link 23 operate behind the vibratory lever 18 disclosinp, thetrip link coupling to be rearwardly engaged.

27 is a return spring; the front end engaging the hole 27 in the forwardend of the back ward draw link 22 and the forward end of re turn sprinlV, IV with horizontal 'diametrical vLine J J, from the backward pivot 21 to forward border pivot 25 circumscrihes what is termed the actuatingplane. The horizontal dianietrical line J J crossing the actuating planefrom the backward border pivot 24 to 7 H ward border pivot 20 indicatesthe no divert tension line and divides the actuating plane into an uppernone of response K and a lower zone of reaction L; the upper zone ofresponse K having to do with the response of the type bar (3 from radiusE to radius F as the key lever 12 is being depressed tron radius 13 toradius l); and the lower zone of reaction L having to do with the recoilof the t pe bar 6 from the printing point A to radius i l at rest as thekey lever 12 is being continually depressed from radius D to radius 0or" depression. he normal or idle position of the backward draw link 22operates v r zone 0 iresponse as shown in F l IV, and 1, H Ill, 1 V.necessary C-llilt the backward drawl n the thrust link 23 be relativelymajor and minor in length, and link 22 be in such form and so engaged inhinge fold fashion so as to pivotal point 26 to oscillate be permit thween the backward border pivot 24, and the 1n crossing and rerorwardborder pivot 25 crossing the horizontal divert tension line 5. in thiscase, tee elements 22 and ii link coupling; are folded during ncidentoidepresison from radius B to us of the key lever 12 simultaneously v. iththe incident of response of the type 6 from radius E to printing pointA; and the hinge fold elements 22 and 23 untold during the rcinaind r ofdepression, raoius D to ra (line C of key lever 12 simultaneously withthe recoil oi the type bar 6 from printing point A back to radius Therearsaddle-backed seat 17 provided by the k v lever 12 stops the back 'ad border l and effects operative tension lock of 23 under influence ofreturn spring 2'? as the key lever 12 is being depress-er. 11'0111 rmins 3 to radms i). This tension lock of 1%. link 28 18 also described ascontractive t4. n lock nieanm that while the key lever 1.. 361112 de,rcsseu, the energy required to respond ;he t pe bar 6 effectseontractive H, 11 1' c g- 1. Q r .1 10

PiQSShiG 01 till a iiem pm or LG the oar ward border pivot 2-JL insteadof expansive The contra e tension or" torus-'25 link stops its osc: andthis link is moved bodily downward with the key lever 12, as shown inFigs. II and II the interior pivot 26 crosses the horizontal diverttension link 53 into the zone of reactionli. Simultaneously withcontra-ctive tension lock of trip link .43, the backward draw link 22operates under expansive tension between the backward border pivot 24the forward border pivot 25 while the key lever 12 is being depressedfrom radius l'i to radius D to respond the type bar 6 from radius Etoprinting" point A and the expansive tension of link 22 being relaxedwhile the key lever continues the incident of depression from radius Dto radius C and simultaneously with the recoil of the type bar 6 fromthe printing point A back to radius of rest E.

A change in relative positions of the backward border pivot 2d and thefor border pivot 25 brings the interior pivot- 2-6 down within the lowerzone of reaction L thereby releasing the contractive tension lock ofthrust link The release of contractive tension lock 01 thrust link 23permits it resume oscillation reversely breaking about the time the typeimpacts the printing point A. When the trip link coupling reverselybreaks in the above manner there being no further obstruction to therecoil of the type bar 6, it immediately recoils from A to E, while thekey lever 12 continues its incident of depression from D to C andcontacting with stop bar 3%.

The dotted line M indicates the correlative relationship of the borderpivot and the interi0rpivot of the actuating plane during; the processof operation, viz: Dotted line M M, Figs. I and I shows where thet-ri-pivotal relationship forms obtuse angle at the interior pivot 26pointing upward within the upper Zone of response during the normalposition and effecting response of the type bar during the depression ofthe key lever 12. Dotted line M M, Figs. II, II" shows the alignmentofthe border pivots and the interior piv- 0t at the time the typecompletes its re sponse or impact and begins to recoil. Dotted line M M,III and III shows the obtuse angle at the interior pivot 26 formed bythe tri-pivotal relationship pointing downward within the zone ofreaction as the ty e bar recoils.

22 is an angular trip hammer provided near the front end of the backwarddraw link moving upward and communicating with the forward edge 18 Figs,II and II of the vibratory lever as means for reversely breaking; saidcoupling after the printi impact of the type bar for its return tonormal position while the key lever remains in depressed position. Theunderside of the trip hammer 22 communicates with the upper edge. 12 Iand I, of key lever 12 thereby restoring the trip link coupling tonormal oper ativo position upon release of the key lever.

lever, a pivotal rod for said v rtically disposed vibratory leverintormediately of its ends, means operatively connect-ii the vibratorylever and type bar, a trip li k coupling con'iprising upward curved drawlink thrust link at all times operatively connecting said key lever andvibratory lever for moving the type bar to the printing point upondepression of the key lever, means actuating said coupling to return thetype bar after printin g impact while the key lever is in dep: lposition, means restoring said coupling to normal operative positionupon release of the key lever.

2, In combination, a type bar, key I segmental pivot rod therefore,actua ing means at al times operatively connecting; said my lever andtype bar comprising a verticaldisposed vibratory lever pivotedintermeliately of its ends, means operatively connectng the vibratory leand type b -r, a trip 'nk coupling comprising a backward draw inkconnected to the vibratory lever, a thrust link pivoted to said keylever intermediately of toe ends of the latter connected to said drawlinkmoving the type bar to printing point upon depression of the keylever, means reversely brea ring said coupling after p" ing impact ofthe type bar, 1? i the type bar to normal position while lw Y lever isin depressed position, means restorino' said coupling to normaloperative position upon release of the key lever.

In a key-action for a typewriting machine, a type bar, a segmental pivotrod therefore, a key lever, actuating means at all times connecting saidkey lever and type bar comprising a vertically disposed vibratory lever,means operative-1y connecting; the vibratory lever and type bar, abackward draw link operatively connected to said vibratory lever, athrust link operatively connecting the backward draw link and key levermovi a the type bar to printin point upon depression of the key lever,means reversely breakingsaid coupling after printing impact of thelatter for return of the type bar to normal position while key lever isin depressed position, means restoring said coupling; to normaloperative position upon release of the key lever.

4. In a key action for key-operating machines, a key lever, a type bar,a backwa draw link, a vertically disposed vibratory lever connected tothe backward draw link,

ieans operatively connecting the vibratory lever and type bar, a thrustlink connected. to

the key lever, a backward border pivot connecting said thrust link anddraw link, a saddle-backed seat provided by the top of the rey lever forsaid backward border pivot, said elements moving the type bar toprinting point upon depression oi key lever, means tripping saidbackward border pivotal point out of the saddle-backed seat reverselybreak-- ing said coupling after printing impact of the type bar forreturning the type bar to normal position while key lever is indepressed position, means restoring said tor-- ward border pivotal pointto the saddlebacked seat upon release of said key lever.

5. In a type key action, a type bar, a key lever having an upwardprojection intermediately of its ends, actuating means at all timesoperatively connecting said key lever and type bar comprising averticall 1 disposed vibratory lever, means operatively connecting thevibratory lever and and type bar, a trip link coupling comprising abackward draw link and a thrust link pivoted to said upward projectionprovided by the key lever moving the type bar to printing point upondepression of the key lever, means reversely breaking said couplingaiter printing impact of the type bar, means for the return of the typebar to normal position while key lever is in depressed position, meansrestoring said coupling to normal operative position upon release of thekey lever.

6. in a type key mechanism, a type bar, a key lever, an upwardprojection provided by the key lever, a saddle-backed seat in the rearof said upward projection, actuating means at all times connecting saidtype bar and key lever comprising a backward draw link, a verticallydisposed vibratory lever pivotedly connected to the upward curved drawlink, means operatively connecting the vibratory lever and type bar, athrust link pivoted to the upward projection of the key lever and ridingthe saddle-backed seat moving the type bar to the printing point upondepression of the key lever, means reversely breaking said couplingafter printing impact of said type bar, means returning the type bar tonormal position while key lever is in de pressed position.

7. In a type key action mechanism, a key lever, a type bar, actuatingmeans at all times operatively connecting the key lever and type barcomprising a backward draw link, a vertically disposed vibratory leverextending upwardly and downwardly from its pivot and connecting saiddraw link, means operatively connecting the vibratory lever and typebar, a thrust link connecting said backward draw link and key levermoving bodily downward with said key lever upon depression of the latterresponding the type bar to printing point, means limiting the downwardmovement of the backward end of said thrust link reversely breaking saidcoupling after the printing impact of the type bar for return ing thelatter to normal position while key lever is in depressed position,means for restoring the thrust link to normal operative position uponrelease of the key lever.

8. In a type key mechanism, a type bar, a rey lever, an upwardprojection thereof, actuating means at all times operatively connectingsaid key lever and type bar comprising a vertically disposed vibratorylever, means operatively connecting the vibratory lever and type bar, atrip link coupling horizontally disposed and engaged above the key leverbackwardly of said vibratory lever, and compressing a backward draw linkand thrust link, a backward border pivot connecting the backward drawlink and the thrust link above the key lever, a forward border pivotconnecting the backward draw link and the vertically disposed vibratorylever above the key lever, an interior pivot connecting the forward endof the thrust link and upward projection of the key lever, said elementsmoving the type bar to printing point upon depression of key lever,means reversely breaking said elements after the printing impact of thetype bar returning the type bar to normal position while key lever is indepressed position, means restoring said elements to normal operativeposition upon release of the key lever.

9. in a typewriting machine, a type bar,

a key lever, an upward projection thereof, actuating means at all timesoperatively connecting said type bar and key lever comprisin avertically disposed vibratory lever, means operatively connecting thevibratory lever and tyge bar, a trip link coupling comprising arelatively long backward draw link and a relatively short thrust linkpivoted to the upward projection of the key lever and normally operatingwithin a lower concavity of said draw link moving the type bar to theprinting point upon depression or the key lever, means tripping saidthrust link out of the concavity of said backward draw link reverselybreaking said coupling after the printing impact of the type bar forreturning the type bar to normal position while the key lever is indepressed position, means restoring said thrust link to its normaloperative position within the lower concavity of said backward draw linkupon release oi the key lever.

10. In a key action for a typewriting machine, a type bar, a key leverwith an upward projection intermediately of its ends, actuating means atall times operatively connecting the key lever and type bar comprising avertically disposed vibratory lever, means operatively connecting thevibratory lever and type bar, a backward draw link, and a thrust linkmoving the type bar to printing point upon depression of the key lever,a backwardly extended fulcrum trip nose provided by the backward end ofthe backward draw link, a saddle-backed seat provided by the key leverin the rear of the upward projection of the latter coo erating with saidfulcrum trip nose reversely breaking said coupling after the printingimpact of the type bar, means restoring said coupling to normaloperative position upon release of the key lever.

11. In a typewriting machine, a type bar, a key lever, actuating meansat all times operatively connecting the type bar and the key levercomprising a vertically disposed vibratory lever, means operativelyconnecting the vibratory lever and type bar, a thrust link pivoted tothe key lever, a backward draw link pivoted intermediately of its endsto the lower end of said vibrator lever and its backward end pivoted tothe backward end of said thrust link moving the type bar to printingpoint upon depression of the key lever, a trip hammer provided by theforward end of the draw link communicating with the forward edge of thevibratory lever reversely breaking said coupling after printing impactof the type bar returning the latter to normal position while the keylever is in d pressed position, the underside of said trip hammercommunicating with the key lever restoring said coupling to normaloperative posit-ion upon the release of the key lever.

12. In a recoil mechanism for a type key, a type bar, a key lever,actuating means at all times operatively connecting the key lever andthe type bar comprising a vertically disposed vibratory lever, meansoperatively connecting the vibratory link and ty1e bar, a backward drawlink, a thrust link moving the type bar to printing point upondepression of the key lever, means reversely breaking said couplingafter the printing impact or the type bar, a return spring supported bythe forward end of the backward draw link and a bar in the front of themachine returning the type bar to normal position while key lever is indepressed position, means restoring said mechanism to normal operativeposition upon release of the key lever.

13, In a mechanical movement for a typewriting machine key, a key lever,a type bar, elements connecting said key lever and type bar comprising avertically disposed vibratory lever, means operatively connecting thevibratory lever and type bar, a trip link coupling composed of abackward draw link and a thrust link, normal operative position or" theelements of said coupling being folded mo the type bar to printing pointupon depression of tne key lever, elements or" said coupling unfoldingreversely breaking said connection after the printing impact of the typebar returning the latter to normal position while key lever is indepressed posit-ion, means restoring the elements of said coupling tonormally folded position upon the release of the key lever.

Signed at Fort Collins, in the county of Larimer and State of Colorado,this 1st day of December, A. D. 1926.

ORVILLE U. DESHA.

